US6379240B2 - Air circulation system for a refrigerated display case and method for ventilating a room space, hall space or a refrigerated division thereof having a refrigerated display case - Google Patents

Air circulation system for a refrigerated display case and method for ventilating a room space, hall space or a refrigerated division thereof having a refrigerated display case Download PDF

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Publication number
US6379240B2
US6379240B2 US09/296,511 US29651199A US6379240B2 US 6379240 B2 US6379240 B2 US 6379240B2 US 29651199 A US29651199 A US 29651199A US 6379240 B2 US6379240 B2 US 6379240B2
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United States
Prior art keywords
air
display case
channel
space
circulation system
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Expired - Fee Related
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US09/296,511
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English (en)
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US20010003702A1 (en
Inventor
Andrey Livchak
Jorma Pekkinen
Tuomas Moilanen
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Halton Oy
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Halton Oy
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Assigned to HALTON OY reassignment HALTON OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIVCHAK, ANDREY, MOILANEN, TUOMAS, PEKKINEN, JORMA
Publication of US20010003702A1 publication Critical patent/US20010003702A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains

Definitions

  • the present invention relates to an air circulation system for a refrigerated display case and a method for ventilating a room space, hall space or refrigerated division in a hall space provided with one or more refrigerated display cases.
  • constructions of refrigerated display cases are known in which the refrigerated display case is provided with an air-circulation system in the shelf space in the refrigerated display case. Air is circulated through a channel placed at the bottom and in the rear wall of the display case to the top portion of the display case and from there, the air is directed as a curtain jet to the front side of the display case and further into a channel placed in the lower part of the display case.
  • the circulation system comprises a blower that produces the circulation flow of air as well as an air refrigerator for cooling the thus-circulating air.
  • a drawback in the prior art constructions of refrigerated display cases is that cold air is discharged from the shelf space of the display case into the store space and further to the vicinity of the floor level. This cold air produces a disagreeable sensation for the customers in the store when situated proximate the display case.
  • a channel for the supply of warm air includes a blower arranged in connection with the refrigerated display case, in which case, air from the room is circulated by means of the blower.
  • the blower is placed in a stationary position in connection with the refrigerated display case, and no separate pipe connections are needed for the refrigerated display case in this embodiment of the invention.
  • a separate heater for example an electric heater to heat the air being directing into the room space via the blower.
  • an embodiment is also possible in which, from a trunk channel, warm or heated air is passed into a channel placed in connection with the refrigerated display case and further, from below the refrigerated display case, through nozzles into the room space.
  • the entire supply of fresh air into the room space, hall space or refrigerated division in a hall space provided with a refrigerated display case preferably takes place through one or more channels placed underneath the refrigerated display case.
  • pairs of refrigerated display cases can be arranged one opposite to the other.
  • the warm intake air is passed into the room space so that it extends as an effective flow up to the flow of warm intake air passed out of connection with the opposite refrigerated display case.
  • the ejecting distance of the intake air can be adjusted to the desired level so that air can be passed out of the opposite display cases so that the whole of the floor area between the display cases is covered with warm intake air.
  • the air circulation system in accordance with the invention which makes air flow in connection with a refrigerated display case, comprises an equipment for supply of warm air, more particularly, a blower in connection with the refrigerated display case and which is in flow communication with a channel or conduit. Air is made to flow by means of the blower out of the channel. The channel is opened at a location below the refrigerated display case. In this manner, warm air is passed to the front side of the refrigerated display case to the vicinity of the floor.
  • the entire supply of fresh air into the room space, hall space or into the refrigerated division in a hall space is optimally arranged to take place from below the refrigerated display case/cases while the fresh air is passed from a trunk channel into a channel placed in connection with the refrigerated display case.
  • the channel is opened at the bottom part of the refrigerated display case so that fresh air flows to the front side of the refrigerated display case to the vicinity of the floor.
  • the display case includes means defining an interior space, e.g., a frame, at least one shelf arranged in the interior space, and an air circulation system for circulating air in the interior space.
  • the supply means are coupled to the display case for supplying warm air to a location in front of the display case and comprise a first channel having an outlet opening situated below the display case and a blower coupled to the first channel for directing air into the first channel and out of the outlet opening.
  • regulation means are arranged in the outlet opening of the first channel for regulating flow of the air through the outlet opening.
  • the regulation means may comprise at least one nozzle or valve arranged to regulate a distance to which the air is ejected from the first channel.
  • the nozzle(s) may be a slot nozzle comprising a rotatable, eccentric regulator piece arranged in opposed relationship to a curved wall whereby rotation of the regulator piece varies an opening between the regulator piece and the curved wall through which the air flows.
  • the air circulation system is arranged to circulate air from a bottom portion of the interior space to a top portion of the interior space.
  • the air circulation system may comprise a second channel and cooling means for cooling air flowing in the second channel.
  • the combination may optionally include a first heat exchanger operative on the air flow in the first channel, and a second heat exchanger operative on the air flow in the second channel, the first and second heat exchangers being arranged to transfer energy such that the air flow in the first channel is heated as the air flow in the second channel is cooled.
  • the first channel has a vertically extending branch adapted to extend along a vertical wall of the display case and above the top of the display case.
  • the combination of the display case and supply means may be positioned flush against a wall an the intake air flow obtained from the space between the top of the display case and the ceiling of the space in which the display case is situated.
  • the first channel would then also includes a horizontally extending branch in flow communication with the vertically extending branch and extending below the display case.
  • FIG. 1A shows a refrigerated display case in accordance with the invention, which is provided with an air circulation system in accordance with the invention.
  • FIG. 1B is a cross-sectional view taken along the line 1 B— 1 B in FIG. 1 A.
  • FIG. 2 shows another embodiment of a refrigerated display case in accordance with the invention situated in a room space.
  • FIG. 3A is a side view of an intake channel used in the air circulation system in accordance with the invention.
  • FIG. 3B shows the intake channel as viewed in the direction of the arrow K, in FIG. 3 A.
  • FIG. 3C shows the intake channel as viewed in the direction of the arrow K 2 in FIG. 3 A.
  • FIG. 4A shows a slot-like nozzle construction
  • FIG. 4B is a sectional view taken along the line 4 B— 4 B in FIG. 4 A.
  • FIG. 5 illustrates a method in accordance with the invention in which warm air is passed from two trunk channels to the bottom parts of the display cases and in which the ejecting distances of the intake air are regulated by means of a nozzle construction as shown in FIGS. 4A and 4B so that the entire passage between the display cases is covered with warm air.
  • FIG. 1A is a perspective, schematic illustration of a refrigerated display case 10 in accordance with the invention and FIG. 1B is a sectional view taken along the line 1 B— 1 B in FIG. 1 A.
  • the refrigerated display case 10 comprises an air circulation system 11 in the interior thereof.
  • the air circulation system 11 comprises a blower 12 for imparting movement to air, an air channel 13 in which the blower 12 is situated and a heat exchanger 14 operative at a location in the air channel 13 after blower 12 in the moving direction of the air (FIG. 1 B).
  • blower 12 instead of blower 12 , other means for imparting movement to the air in channel 13 can be provided.
  • the position of blower 12 in channel 13 as shown is not limiting and the blower 12 may be situated elsewhere in channel 13 .
  • channel 13 may be formed from a single passage-defining component or multiple components in flow communication with one another.
  • air is circulated through the air channel 13 to the top portion of a shelf space D in the refrigerated display case 10 , and air is also discharged from a rear wall F of the shelf space D directly into connection with shelves 15 a 1 , 15 a 2 , 15 a 3 , 15 a 4 .
  • the air is discharged from the top portion of the shelf space D as curtain jets L 1a in the vicinity of the front wall of the refrigerated display case 10 (not shown).
  • the channel 13 which has an inlet opening at the bottom portion of the display case 10 and by means of a circulation of air produced by the blower 12 , air is circulated through the heat exchanger 14 and cooled thereby.
  • the cooled air is forced up, e.g., by the effect of blower 12 , through the channel 13 running along the rear wall F of the space D to the top portion of the space D, where the cold air is discharged into the space D.
  • Component flows L 1 ′, L 1 ⁇ , . . . of cold air are directed into connection with the shelves 15 a 1 , 15 a 2 , . . . , i.e., over the shelves, out of a vertical portion of the channel 13 through flow openings or flow nozzles 13 a 1 , 13 a 2 , . . .
  • the rear wall F of the space D can be formed by a panel defining the channel 13 .
  • the air circulation system comprises supply means 16 for supplying intake air in connection with the refrigerated display case 10 , more specifically to a location in front of the refrigerated display case 10 .
  • the supply means 16 comprises a blower 17 arranged in connection with the refrigerated display case 10 and an intake air channel 19 .
  • Blower 17 is arranged to blow air from the room from a location above the display case 10 or air that has been heated into the channel 19 .
  • Channel 193 includes a vertically extending branch adapted to be situated alongside a vertical wall of the display case 10 and a horizontally extending branch adapted to be situated below the display case 10 .
  • a heat exchanger 102 (dashed lines) or an electric heater 18 is arranged in the channel 19 to heat the air drawn into the channel 19 by blower 17 .
  • the air is passed out of the channel 19 into the room space H through nozzles or valves 24 a in the outlet opening of channel 19 to locations below the display case 10 (FIG. 1 A).
  • the flow of air blown from the bottom portion of the display case is denoted by arrows L 2 .
  • blower 17 other means for imparting movement of air into and through channel 19 can be provided.
  • the position of blower 17 at the top of the vertically extending branch of channel 19 is not limiting and the blower 17 may be situated elsewhere in channel 19 .
  • channel 19 may be formed from a single passage-defining component or multiple components in flow communication with one another to define a flow passage from an inlet at the top of vertically extending branch of channel 19 to the nozzles or valves 24 a in the outlet opening of the channel 13 .
  • the blower 17 for producing the flow of air is placed directly in connection with the refrigerated display case 10 above the top of the display case 10 and connected with the display case 10 .
  • the air can be heated to a desired temperature by means of the heat exchanger 102 or, preferably by means of the electric heater 18 , which is associated with the channel 19 and operative on the air flowing therethrough.
  • the blower 17 draws or sucks air out of the room space H.
  • the suction side of the blower 17 is connected to a trunk channel 21 for fresh intake air (FIG. 2 ).
  • the dashed lines in FIG. 1B illustrate a heat exchanger construction in which heat is transferred from a heat exchanger 101 arranged in channel 13 to the heat exchanger 102 in channel 19 .
  • the heat exchanger 101 is placed at the cold side, and its function is to cool the air that is circulated in the circulation within the refrigerated display case 10 , and the heat is transferred from the heat exchanger 101 to the heat exchanger 102 in order to heat the air in the channel 19 .
  • heat is transferred from the air that flows in the channel 13 into the air that flows in the channel 19 .
  • the system is thus quite economical.
  • FIG. 2 shows a refrigerated display case 10 in accordance with the invention as positioned in a room space, a hall space or in a refrigerated division in a hall space H.
  • Fresh air is passed into the channel 14 in the refrigerated display case 10 directly from the trunk channel 21 placed in the vicinity of a ceiling K of the room space or the refrigerated division H.
  • the entire supply of fresh intake air into the room space or the refrigerated division H is preferably arranged by means of the system in accordance with the invention.
  • the entire fresh intake air for the room, the hall space, or for the refrigerated division which fresh intake air can be heated or which can be passed directly from outdoors, for example, in the summer time without heating, is passed into the room space through the channel 19 and discharged to the front side of the display case/cases.
  • Air is passed out of room space or hall space H into an air exhaust channel 22 which includes an exhaust air valve 23 , which is opened into the room space or hall space H at a top portion of the space.
  • the discharge of air takes place through the exhaust air valve 23 and through the exhaust channel 22 .
  • the discharge air flow L 3 is produced by a blower optionally arranged in the exhaust channel 23 and the intake air flow is produced by a blower optionally arranged in the channel 19 or trunk channel 21 .
  • the blower for the intake air flow can be substituted for by a blower 17 connected with the refrigerated display case 10 .
  • FIG. 3A is a side view of the intake air channel 19 incorporated into the display case 10 (without the blower 17 and heater 18 ).
  • FIG. 3B shows the intake air channel 19 as viewed in the direction of the arrow K 1 in FIG. 3A, i.e., from the top.
  • FIG. 3C shows the intake air channel 19 as viewed in the direction of the arrow K 2 in FIG. 3 A.
  • the air (arrow L 2 ) is passed into an air chamber M placed at the end of the horizontal branch of channel 19 and branched to the nozzles or valves 24 a 1 , 24 a 2 . . . which can be preferably valves provided with a wing rim (not shown), which produces vortex formation in the flow.
  • FIG. 4A shows an embodiment of the invention in which the channel 19 terminates in a slot nozzle 25 including at least one nozzle slot 26 .
  • FIG. 4B is a sectional view taken along the line 4 B— 4 B in FIG. 4 A.
  • the air flow taking place through the nozzle slot 26 is regulated by means of an oblong regulator piece 27 placed in the chamber M.
  • the regulator piece 27 is an eccentric piece, which can be rotated into different positions of regulation relative to a curved air-flow guide face E in the chamber M to thereby enable adjustment of the flow through nozzle slot 26 .
  • Other means for regulating the flow of air through the outlet opening of the channel 19 e.g., the ejecting distance, rate or volume, can also be provided.
  • FIG. 5 shows an embodiment of the invention in which the air flows from opposite refrigerated display cases 10 are arranged so that the ejecting distance of each intake air flow L 2 covers one half of the width J of the passage between the display cases 10 .
  • the entire area of the passage J between the display cases 10 can be covered with warm air by regulating the slot nozzle 25 in accordance with FIGS. 4A and 4B provided at the ends of the channels 19 in the display cases 10 .

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
US09/296,511 1998-04-23 1999-04-22 Air circulation system for a refrigerated display case and method for ventilating a room space, hall space or a refrigerated division thereof having a refrigerated display case Expired - Fee Related US6379240B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI980897A FI108609B (fi) 1998-04-23 1998-04-23 Kylmätiskiin liittyvä ilmankiertojärjestelmä ja menetelmä ilmanvaihdossa kylmätiskillä/kylmätiskeillä varustetussa huone- tai hallitilassa tai hallitilan kylmäosastossa
FI980897 1998-04-23

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US20010003702A1 US20010003702A1 (en) 2001-06-14
US6379240B2 true US6379240B2 (en) 2002-04-30

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US09/296,511 Expired - Fee Related US6379240B2 (en) 1998-04-23 1999-04-22 Air circulation system for a refrigerated display case and method for ventilating a room space, hall space or a refrigerated division thereof having a refrigerated display case

Country Status (6)

Country Link
US (1) US6379240B2 (fi)
DE (1) DE19914769A1 (fi)
FI (1) FI108609B (fi)
FR (1) FR2777763B1 (fi)
GB (1) GB2336656B (fi)
SE (1) SE518772C2 (fi)

Cited By (11)

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US6519962B1 (en) * 2002-06-27 2003-02-18 Carrier Corporation Refrigerated merchandiser angular air guide vanes
US20030213260A1 (en) * 2001-08-22 2003-11-20 Mark Lane Service case
US20050136160A1 (en) * 2003-12-05 2005-06-23 Delaware Capital Formation, Inc. Display deck for a temperature controlled case
US20060010894A1 (en) * 2004-04-01 2006-01-19 Woodrow Wilson Refrigerated merchandiser
US20060059934A1 (en) * 2004-09-23 2006-03-23 Delaware Capital Formation, Inc. Adjustable shelf system for refrigerated case
US20060207281A1 (en) * 2005-03-15 2006-09-21 Sanden Corporation Showcase
US20080053113A1 (en) * 2004-04-20 2008-03-06 Nordstrom Mark T Display case with improved sanitation
US20090264060A1 (en) * 2006-04-18 2009-10-22 Oy Halton Group Ltd. Recirculating exhaust system
US20140263126A1 (en) * 2013-03-15 2014-09-18 Hussmann Corporation Uni-body merchandiser
US9687086B2 (en) 2011-09-02 2017-06-27 Carrier Corporation Refrigerated sales furniture
US9737156B2 (en) 2013-12-23 2017-08-22 Hussmann Corporation Zone cooling in a refrigerated merchandiser

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GB2353347A (en) * 1999-07-02 2001-02-21 Noise Solutions Ltd Cold cabinets
ES2167280B1 (es) * 2000-10-26 2003-06-01 Frost Trol S A Sistema de recuperacion de calor para climatizacion y reduccion del efecto pasillo frio.
DE10205621B4 (de) 2002-02-12 2006-08-24 AHT Kühlmöbelwerk Limburg GmbH Kühlregal zur Präsentation und Kühlung von in einem Kühlraum aufgenommenen Waren
KR20060022225A (ko) * 2003-06-27 2006-03-09 지에이씨 가부시키가이샤 수납장치
KR20060023517A (ko) * 2003-06-27 2006-03-14 지에이씨 가부시키가이샤 덕트 시스템 및 수납장치
US7565808B2 (en) * 2005-01-13 2009-07-28 Greencentaire, Llc Refrigerator
ES2267406A1 (es) * 2005-08-25 2007-03-01 Frost-Trol, S.A. Sistema perfeccionado de recuperacion de calor para climatizacion y reduccion del efecto "pasillo frio".
FR2890723B1 (fr) * 2005-09-12 2007-11-23 Johnson Controls Mc Internat Procede de destratification thermique d'une allee formee entre des meubles frigorifiques
US7726135B2 (en) 2007-06-06 2010-06-01 Greencentaire, Llc Energy transfer apparatus and methods
DE102007051726A1 (de) * 2007-10-25 2009-04-30 Hänel & Co. Lageranordnung mit vorgebbarer Lagerungsatmosphäre
US20090200005A1 (en) * 2008-02-09 2009-08-13 Sullivan Shaun E Energy transfer tube apparatus, systems, and methods
RU2012145946A (ru) * 2010-03-29 2014-05-10 Эплайд Дизайн Энд Инжиниринг Лтд Охлаждаемая витрина
US9687088B2 (en) * 2013-04-08 2017-06-27 Heatcraft Refrigeration Products Llc Deflector for display cases
GB201411474D0 (en) * 2014-06-27 2014-08-13 Wirth Res Ltd An open refrigerated display case and a flow stabilising device

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US3263745A (en) * 1963-06-13 1966-08-02 Emhart Corp Open-front refrigerated display case
US3509834A (en) * 1967-09-27 1970-05-05 Inst Gas Technology Incinerator
US3462966A (en) 1967-12-05 1969-08-26 Beverage Air Co Condensation removing means for refrigerated cabinets
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Cited By (19)

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Publication number Priority date Publication date Assignee Title
US20030213260A1 (en) * 2001-08-22 2003-11-20 Mark Lane Service case
US6889514B2 (en) * 2001-08-22 2005-05-10 Delaware Capital Formation, Inc. Service case
US6519962B1 (en) * 2002-06-27 2003-02-18 Carrier Corporation Refrigerated merchandiser angular air guide vanes
US20050136160A1 (en) * 2003-12-05 2005-06-23 Delaware Capital Formation, Inc. Display deck for a temperature controlled case
US7357000B2 (en) 2003-12-05 2008-04-15 Dover Systems, Inc. Display deck for a temperature controlled case
US20060010894A1 (en) * 2004-04-01 2006-01-19 Woodrow Wilson Refrigerated merchandiser
US20080053113A1 (en) * 2004-04-20 2008-03-06 Nordstrom Mark T Display case with improved sanitation
US7540162B2 (en) 2004-04-20 2009-06-02 Mark T Nordstrom Display case with improved sanitation
US7121104B2 (en) 2004-09-23 2006-10-17 Delaware Capital Formation, Inc. Adjustable shelf system for refrigerated case
US20060059934A1 (en) * 2004-09-23 2006-03-23 Delaware Capital Formation, Inc. Adjustable shelf system for refrigerated case
US20060207281A1 (en) * 2005-03-15 2006-09-21 Sanden Corporation Showcase
US20090264060A1 (en) * 2006-04-18 2009-10-22 Oy Halton Group Ltd. Recirculating exhaust system
US10473336B2 (en) * 2006-04-18 2019-11-12 Oy Halton Group Ltd. Recirculating exhaust system
US10634365B2 (en) 2006-04-18 2020-04-28 Oy Halton Group Ltd. Modular services supply arrangement
US11384941B2 (en) 2006-04-18 2022-07-12 Oy Halton Group Ltd. Exhaust hood
US9687086B2 (en) 2011-09-02 2017-06-27 Carrier Corporation Refrigerated sales furniture
US20140263126A1 (en) * 2013-03-15 2014-09-18 Hussmann Corporation Uni-body merchandiser
US10117525B2 (en) * 2013-03-15 2018-11-06 Hussmann Corporation Uni-body merchandiser
US9737156B2 (en) 2013-12-23 2017-08-22 Hussmann Corporation Zone cooling in a refrigerated merchandiser

Also Published As

Publication number Publication date
FI108609B (fi) 2002-02-28
SE9901341D0 (sv) 1999-04-15
FI980897A0 (fi) 1998-04-23
SE9901341L (sv) 1999-10-24
GB2336656A (en) 1999-10-27
DE19914769A1 (de) 1999-10-28
SE518772C2 (sv) 2002-11-19
FI980897A (fi) 1999-10-24
GB9909321D0 (en) 1999-06-16
FR2777763A1 (fr) 1999-10-29
GB2336656B (en) 2002-07-10
FR2777763B1 (fr) 2001-10-05
US20010003702A1 (en) 2001-06-14

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